(19)

(11)

EP 2 422 524 A1

(12)

(43) Date of publication: 29.02.2012 Bulletin 2012/09 (21) Application number: 09843769.2 (22) Date of filing: 22.04.2009

(51) International Patent Classification (IPC):  H04N 9/07(2006.01) H04N 9/64(2006.01) (86) International application number: PCT/US2009/041365 (87) International publication number: WO 2010/123499 (28.10.2010 Gazette 2010/43)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR (71) Applicant: Hewlett-Packard Development Company, L.P. Houston, TX 77070 (US)	(72) Inventors: MATHERSON, Kevin Ft. Collins, CO 80528-9544 (US) WANG, Yu-Wei Ft. Collins, CO 80528-9544 (US) (74) Representative: Wraige, David Leslie Charles  Elkington and Fife LLP Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)